China, Japan and South Korea have agreed to cooperate on ending North Korea’s nuclear programme and promoting free trade.

The agreements came at the first summit for the north-east Asian neighbours after a hiatus of more than two years, bringing together Japanese Prime Minister Shinzo Abe, Chinese premier Li Keqiang and South Korean President Moon Jae-in.

Mr Abe said they discussed how they can get North Korea to give up its nuclear weapons, but he did not provide any details.

China and Japan, in particular, have differences over how best to achieve North Korea’s nuclear disarmament.

The meeting comes amid a flurry of developments on the Korean Peninsula.

North Korean leader Kim Jong Un met Mr Moon on April 27 and Chinese President Xi Jinping earlier this week, in a surprise visit to the Chinese coastal city of Dalian.

US secretary of state Mike Pompeo flew to Pyongyang, North Korea’s capital, early on Wednesday to finalise details of a summit planned between US President Donald Trump and Mr Kim.

The summit is expected to focus on North Korea’s nuclear programme (Eugene Hoshiko/AP)

“We must lead the ongoing momentum towards complete denuclearisation of the Korean Peninsula and achieve peace and stability in north-east Asia,” Mr Abe told a joint news conference in Tokyo.

Japanese deputy chief cabinet secretary Yasutoshi Nishimura said the three leaders also agreed to work towards two free trade agreements, a free trade pact among themselves and the proposed Regional Comprehensive Economic Partnership with south-east Asian nations.

Mr Trump has threatened all three countries with tariffs in a bid to seek trade concessions from them. His moves have raised fears of a trade war between the US and China.

Mr Li, the number two official in China after President Xi Jinping, said earlier that free trade is a good way to promote a global economic recovery.

“We are willing to work with Japan and South Korea to jointly maintain regional stability and push forward the development of the three countries,” he said before the meeting started.

The leaders also agreed to hold trilateral summits on a regular basis and set up a secretariat. The summits, which started in 2008, are supposed to be held annually, but Wednesday’s was the first since November 2015.

The summit hopes to improve the sometimes-frayed ties among the three north-east Asian neighbours. (Eugene Hoshiko/AP)

Analysts say Japan is trying to showcase improved ties and cooperation with China and South Korea so its views will be represented in any negotiations with North Korea.

Mr Abe reiterated Japan’s position that it would normalise ties with North Korea only if the latter took concrete steps towards abandoning its nuclear and missile programmes and resolved the issue of Japanese abducted by North Korean agents.

Japan’s leader was to hold talks separately with Mr Moon and Mr Li later. Japanese officials said they plan to propose a free and peaceful East China Sea, but do not plan to raise contentious issues such as South Korean “comfort women” forced to provide sex to Japan’s wartime military.

Mr Moon is to leave Japan after half a day. After that, Mr Abe will host a dinner and lunch for Mr Li and join him on the northern island of Hokkaido on the final day of his four-day Japan visit.

Japanese foreign ministry officials said they want to improve Japan’s strained relations with China, with the eventual goal of realising a visit by Mr Xi.

While Japan, China and South Korea are closely linked economically, anti-Japanese sentiment runs deep in China and South Korea because of territorial and historical disputes dating back to Japan’s colonisation of the Korean Peninsula and invasion of China in the first half of the 20th century.